I'm attempting to install the Contact Form plugin. I believe that I've uploaded the correct folder to the correct location, but it's not showing up in the control panel. I'm relatively new to Craft, so this is the first plugin that I've installed.
This is my folder structure:
I've seen a couple questions that indicate that the most common problem is improper capitalization on the plugin folder. However, as you can see, mine is all lower case.
I'm building this site on a Linux localhost and I've even gone so far as to chmod 777 plugins -R just to be sure it's not a permissions issue.
I've made sure to clear caches after every change, but no matter what I do I can not get the plugin to show up in the CP.
What else should I look at to diagnose and fix this?

craft/storage/runtime/logs? If this is on a public box and you want to send some CP/FTP creds over to support@craftcms.com we can take a look and update here with any findings as well. – Brad Bell Aug 26 '16 at 04:42[warning]or[error]entries in the logs. – Brad Bell Aug 26 '16 at 19:24